Pressing machine



Feb. 7, 1933. R. c. PAULY 1,896,496

FRESSING MACHINE Filed May 11, 1929 4 Sheet-Shet 1 Feb.7, 1933. R. c. PAULY 1,896,496

PRESSING MACHINE Filed May 11, 1929 4 Sheets-Sheet 2 A TTORNE KI Feb. 7, 1933. R c PAULY- 1,896,496

PRESSING MACHINE Filed May 11, 1929 4 Sheets-Sheet 4 .Paazpr 631 40; Y B Y r ATTORNEYJ Patented Feb. 7, 1933:

UNITED STATES PATENT OFFICE ROBERT c. PAULY, or cmcnmarr, onro, assrenoa TO THE AMERICAN LAUNDRY mcnnmav COMPANY, or CINCINNATI; 01110, ,A CORPORATION or omo 4 rnnssme mAoHmE Application filed May 11,

This invention relates to improvements in machines for pressingfabrics, such as wearing apparel, and has particular relation to improvements in those parts of such mathereof. Such a machine is, closed by ringtwo separate maintaining means, one'for the control mechanism, said valve being in open 100 ing about pressing engagement of the two pressin members of the machine and is opened by bringing about disengagement or separation of said members, su cient separation being preferably produced to provide convenient access to the lower pressing mem-' ber for arranging'thereonthe work to be pressed. One or both of the pressing members may. be movable, although these'machines usually have the lower pressing member stationary and the upper pressing member movable into and out of engagement therewith.

One of the objects of the present invention is the provision of such a fabric pressing machine having improved mechanism for controlling the closing and opening of the press, said control mechanism including a single inlet valvehaving a normal tendency .to close and a single outlet or exhaust valve also having a normal tendency to close but held in open condition, when the press is open, by maintaining -means provided therefor. s

A further object of the present inventlon is the provision of such a pressing machine having improved control mechanism as above specified, with said mechanism requiring for. its operation to effect closing of the press, the use of both of the operatorshands and furtherrequiring the operation of the inlet valve prior to the operation of the outlet or exhaust valve. Such sequential operation of the valves is insured by a valve interlock which latches the outlet or exhaust valve against operator operation when the press is open, said latch being releasable by operation of the inlet valve.

A further object of theinvention is the provision of such a pressing machlne having improved control mechanism as above specified, with said mechanism including 1929. Serial No. 362,221.

inlet valve and one for the outlet valve, both of said maintaining means being of mechanical character and being operable by closing and opening movements of the press. The maintaining means for the inlet valve holds 7 said valve closed during the pressing operation but does not become'efi'ective for this purpose until the pressing members have been brought into engagement or substantially so. The maintaining means for the outlet valve holds said valve open when the press is open and remains eifective to bring about opening of the outlet valve until the pressing members have been. brought into engagement or substantially so. When the press is open, the inlet valve remains closed because it is a normally closed valve and when the press is closed, the outlet or exor exhaust valve, such sequential valve operation being accomplished and the, press opened by the use of but one'hand of the 0peratorhcr left hand for actuating the operating means for the outlet or exhaust valve.

Further objects of* the invention are in part obvious and in part will appear more in detail hereinafter.

In the accompanying drawings, Fig. 1 is an elevation of the right side of a pressing machine embodying the present invention, part of the frame of the machine being broken away to show interior construction; Fig. 2 is an elevation of the left side of the machine; Fig. 3 is a schematic view of the mechanism for controlling the press operations; Fig. 4 is a detail sectional view of some parts of the control mechanism of the machine, the view being on the lines 4 4, Figs. 1 and 2; Fig. 5 is a detail view of the inlet Valve of the position due to operator operation but with the pressstill open; Fig. 6 1s a similar view but showing said inletvalve closed, this being during the pressing operation by maintaining means provided therefor; Fig. 8 is a detail view of the outlet valve in the open position which it occupies when the pressis open, the position of the latching means for said outlet valve, after actuation of the inlet valve, being shown in dash-dot lines; Fig. 9 is a detail view of the outlet valve after it has been closed by operator operation; and Fig. 10 is a detail View showing the outlet valve in the closed position which it occupies during the pressing operation, thev maintaining means therefor being now ineffective to open said.

valve. A

The pressing machine illustrated in the drawings includes a suitable frame 1 having 'a pedestal 2 on which is, mounted a lower pressing member 3. Said frame is also provided with a rearwardly and upwardly extending arm 4 on the upper end of which is pivoted at 5 a head lever 6 carrying at its forward end an upper pressing member 7. Connected to the rear end portion of said head lever are the upper ends of two springs 8 having their lower ends connected to a pm' 17 mounted in the machine frame, said springs tending to move said head lever and hence the upper pressing member 7, in a clockwise direction, Fig. 1, and thereby serving to open'the press and to thereafter maintain the press open with the upper pressing member separated from the lower pressing member a s'ufiicient amount to enable convenient access) to be had to said lower pressing member for arranging thereon the work to be pressed.

The means for moving the upper pressing member into and out of pressing engagement with the lower pressing member includes a toggle comprising an upper member 10 and alower member 11, the upper end of said lower member being connected to the lower end of the-upper member by a pin 12. The upper end of the upper to gle member is connected at 13 to the rearend portion of the head lever 6 while the lower end of the lower toggle member 11 is connected at '15 to the rear end of a pressure lever 16 pivoted at 17 to the frame of the machine. The pressure lever 16 is provided between its pivot point and its front end with an upwardly extending arm 19 carrying a roller 20 at its upper end. This roller is movable in a cam slot 21 of a cam lever 22 having its front end pivoted at 23 to the machine frame and its rear end connected at 24 to the forward end of a connecting rod 25 having its rear end connected to the toggle knuckle pin 12. The means for operating the pressure lever 16 to effect straightening of the toggle and hence closing of the press includes a cylinder 30 having its lower end secured at 31 to the machine frame and having movable therein a piston 32 mounted on the upper end of a piston rod 33. The lower end of said piston rod is provided with a roller 34movable in" a slot 35 in the front end of the pressure lever 16, all as clearly shown in Fig. 1.

Either steam or air is suitable for moving the piston 32 in the cylinder 30 to effect closnected to the supply side of a needle valve 46.

Connected to the discharge side of said needle .valveis one end ofa pipe 49 having its other end connected to a T 50. Connected to this T is one end of a pipe 51 having its otherend connected to an elbow 52 in turn connected to one end of a pipe 53 having its other-end con nected to the upper end of the cylinder 30.

To close the press, the inlet valve 42 is opened and an outlet or exhaust valve 64 hereinafter described is closed. Steam or air from supply pipe 40 is now free to flow through the inlet valve to the cylinder 30 and the piston 32in said cylinder is moved downwardly under the ressure of said steam or air. The pressure ever 16 is moved by the piston rod 33 in a counter-clockwise direction, Fig. 1, about its pivot 17 and the downwardlmovement of the roller 20 of the lever arm 19 actuates the cam lever 22 in a clockwise direction to produce forward movement of the connecting rod 25.- Such forward movement of the connecting rod straightens the 'toggle formed by members 10 and 11 and causes thehead lever 6 to move, about its pivot 5 in a counter-clockwise direction, thereby bringing the upper pressing member 7 downinto engagement with the lower stationary pressing member 3. At the same time, the toggle members 10 and 11 are raised by the counter-clockwise move- 'ment of the pressure lever 16, which further elevates the rear end portion of the head lever'6 and causes the pressing member 7 on 1 right side of the machine for operation by T for receiving from the cylinder 30, by means of T 50, pipe 51, elbow 52 and pipe 53, the fluid to be exhausted from said cylinder. The other end of pipe is connected to one end of an elbow 61 having its other end connected to one end of a pipe 62. The other end of pipe 62 is connected to the supply side of the casing 63 of an outlet or exhaust valve represented generally by the reference numeral 64. The flow of fluid through this outlet or exhaust valve is controlled by a valve member 66 normally tending to move to closed position against its seat under the influence of a spring 67. Said valve member is normally maintained in open position away from its seat,'however, by a maintaining means provided therefor. a description "of which will later. appear. Connected to the discharge side of this out let or exhaust valve casing is one end of a pipe 70 having its other end connected to a fitting7l, Fig. 2, to which fitting is also connected a pipe 72 leading to any suitable discharge source.

lVhen it is desired to open the press, the inlet valve is closed and the outlet or exhaust valve is opened. The steam or the air in the cylinder 30 can then escape therefrom through the conduit means ust described and the press is opened by the springs 8, said springs holding the press open until the control mechanism is operated to effect opening of the inlet valve and closingv of the outlet or exhaust valve.

In order to safeguard the operator of the press from having one or both of her hands caught and crushed between the pressing members by the closing of the press, the present controlmechanism requires for its operation to effect closing of the pressthe use of both of the operators hands. The use of one of her hands is needed for the operation of the inlet valve and the use of her other hand is needed for the operation of the outlet or exhaust valve. The use of both hands is required until the pressing members have been brought into engagement or substantially so,after which liability of injury to her hands is past and she is then free for other duties or for other things, such freedom being due to the provision of the inlet valve maintaining means hereinafter described.

In the present embodiment of the invention, the inlet valve 42 is arranged on the the right hand of-the operator and the outlet or exhaust valve 64 is arranged onthe left side of. the machine for operation by the operators left hand. The operating means for the inlet valve includes a hand lever pivoted at 81 to a bracket 82 carried by a bracket 83 secured to the right side of the machine frame and supporting the Tight side of a work supporting table 84. Said clevis 86 in turn connected to the forward end of a rod 87havin its rear end connected to a pin 88' carried y the upper end of a lever 89 forming a part of the valve interlock hereinafter described. Also connected to the pin 88 of lever 89 is the forward end of a rod 92 having its rear end connected to a clevis 93 in turn connected at '94 to a valve operating lever 95. An extension 96 of said lever is pivoted at 97 to the casing 41 of the H inlet valve 42 and is connected at 99 to the upper end of the operating stern 100 for the valve member 43 of the inlet valve.

By pushing downwardly on the button 80a of the inlet hand lever 80, rods 87 and 92 and clevises 86 and 93 are moved rearwardly and the valve operating lever with its extension 96 are moved in a clockwise'direction about their pivot 97, Figs. 1, 5 and 6, (in a counter-clockwise direction as viewed in' Fig. 3). Such movement. causes the link 98 connected to the lever extension 96 to move the Val! stem downwardly, thereby moving the valve member 43 of the inlet, valve away from its seat and permitting fluid to flow.

through said valve. Communication is thus established between the fluid supply pipe 40 and the cylinder 30 so that fluid can be delivered to said cylinder for the closing and work pressing operation. By regulating the needlevalve 46, the flow of fluid therethrough can be controlled, and either fast or slow' press closing operations obtained, as will be readily understood.

The operating means for theoutlet'valve is quite similar to the previously described op erating means forthe inlet valve. In other words, the "outlet valve operating means into the left side of the machine frame and supporting the left side of the work supporting table 84. Said hand lever is provided with a depending arm 109 to which is nected to the forward end of a rod having itsre'a-r end connected to a clevis 121 in turn connected at 122 to a valve operating lever 125. Thepurpose of the lost motion connection between rods 111 and 120 will later appear. An extension 126 of said lever is pivoted at 127 to the casing 63 of the outlet or 1 exhaust valve 64 and is connected to the lower end of a link 130 having its upper end connected at 131 to the upper end of the operating stem 132 for the valve member 66 of the outlet or exhaust valve. 1

q therefor.

'By pushing downwardly on the button 105a of the outlet hand lever105, rods 111 and 12Q, link 118 and clevis'es 110 and 121 are moved rearwardly and the valve operating lever 125 with its extension 126Qare moved in a counter-clockwise direction about their pivot 127, Figs. 2, 8 and 9, (in a, clockwise direction as viewed in Fig. 3). Such movement causes the link 130 connected to the lever extension 126 to move the valve sten 1 132 upwardly, th'ereby moving the valve member 66 of the outlet or exhaust valve against its seatand preventing the flow of fluid through said valve. \Vhen said valve is closed, the

Slidably mounted in the upper portion of said sleeve isa rod 177 provided at its lower end with a head 178, and arranged in the lower ,portion of said sleeve between said head 178 and the bottom wall 179 of the sleeve is a spring 180. The upper and outer end of i rod 177 is connected to a clevis 182 having its upper end pivoted at 183 to an arm 184 secured to and movable with the rearend portion of the head lever 6. When the press is open, as in Fig. 2 and 8, the rod 177 is in lowered position and the spring 180 in sleeve '175 is compressed. W hen strengthened by such compression, the spring 180 is stronger than the spring 67 whichnormally tends to close the outlet orexhaust-valve, so that said valve is held open by spring 180. When the press is closed, the rod 177 is raised, since it moves with the rear end portion of the head. lever 6, and the spring 180 is no longer com pressed but has merely its normal strength. Spring 67 is now stronger than spring 180 and spring 67 now serves to maintain the outlet or exhaust valve closed. Spring 67 does not become stronger than spring 180, however, until the pressing members h'a've been brought into engagement, or substantially so, for untilsuch engagement occurs, the rod 177 has not been raised asuificient amount to .free'the spring 180 from its compressing and thereby strengthening effect. Therefore,

if the operating means'for the outlet or exliaust valve is released prior'to engagement .of the pressing members, the outlet orexhaust valve will be opened by spring 180.

Similar but separate maintaining means'is provided for holding the inlet valve open during the pressing operation, thereby freeing the operator for, other duties or other,

things, said maintaining means being not 1 effective, however, until after the pressing members have been brought into engagement or substantially so. The maintaining means for the inlet valve includes a sleeve 190 having its lower end pivoted at 19 1 to the upper end of the inlet valve operating lever 95. Slidable in the upper portion of said sleeve is a, rod 192 provided at its lower end with' a head 193 and having its upper end connected to a clevis194 pivoted at 195 to an arm 196' connected toand movable with the rear end portion of the head lever 6. Surrounding the lower end portion of rod 192 and arranged -betweenthe head 193 thereof and the upper end 199 of said sleeve is a spring 200. When the operating means f'orithe inlet valve is actuated to effect opening of said valve, the operating lever 95 for said valve turns in a clockwise direction, Figs. 1, 5,6 and 7, and the sleeve 190 connected thereto is raised, as indicated in Fig. 6. During closing of the press, the rod 192 moves upwardly with the rear end portion of the head lever 6, and when the pressing members have been brought into engagement, said'rod has been moved upwardly a sufiicient amount to yieldingly hold said sleeve in the position to which ithas been raised, as indicated in Fig. 7. The inlet valve is thus held open for the pressing operation. I

The operator, therefore, to effect closing of the press, is compelled to manually hold, .the inletvalve open and the outlet or exhaust valve closed until the pressing members have been brought into engagement, after which the inlet, valve maintaining means becomes effective to hold theinlet valve open and the outlet or exhaust valve is held closed by its spring 67. The operator is thus freed for other duties or for other things'aft'er there is no longer any liability of injury to her hands by being caught and crushed between the pressing members, during closing of the press. When the operating means for the outlet or exhaust valve is actuated to effect opening of thepress,"ashereinafter described,

the inlet valve is closed and remains so, since it is a normally closed valve: The outlet or exhaust valve is opened and it remains so due to the maintaining means provided I therefor, the closin t endency of its spring 67 being overcome ythe spring-180 of the maintaining means. i

If the operator holds the outlet or exhaust valve closed but releases the inlet valve hand lever 80 before engagement of the pressing. members has been brought about (and hence beforetheinlet valve niaintaining means becomes effective), the supply of fluid to cylinder 30 will-be cut off and the upper pressing member will stop in the position in which it then is. If the inlet valve is kept. open but the operator releases the outlet or' exhaust .valve hand lever'105 before engagement (fl the pressing members has been broughtabout (and hence before the outlet valve maintaining means becomes ineffective) then the fluid in cylinder 30 will be exhausted therefrom and the press will be fully opened by springs 8.

Depression of the inlet hand lever 80 will effect opening of the inlet valve 42 and fluid ,will be supplied to the cylinder 30. If, howopened by depression of its hand lever 80,.

then the press would not be closed for no fluid would be supplied to the cylinder 30 for operation of the piston 32 therein. It is therefore necessary to depressboth-of the hand levers 80 and 105 to effect closing of the ress. L P If the inlet valve were to leak, then it would be possible to effect closing of the press by depression of the hand lever 105 to close the outlet or exhaust valve, leaving the right hand of the operator free, with consequent liability of injury thereto by being caught and crushed between the pressing members as the press is closed. In order to absolutely safeguard the operator, means is provided for requiring opening operation of the inlet valve before closing operation of the outlet or exhaust valve can be effected, thereby making it necessary to first operate the inlet va1ve, even though it is lealn'ng.

The means provided for this purpose is a valve interlock and includes a latch member 140 having its rear end pivoted at 141 to a bracket 142 secured to the left side of the machine frame. Said latch member is provided on the lower side of its free or front end with a notch 144 to receive a roller 145 carried by.the upper end of the lever 116'- before referred to, such as by being mounted on one end of the pin 115 of said lever. Said lever 116 has its lower end loosely mounted on the left end of a shaft 147 extendi v'ersely. through and journalled in t e rear arm 4 of the machine frame, as best shown in Fig. 4. The right end of said shaft has pinned or otherwise rigidly connected thereto the lower end of lever 89, the pin 88 of which, at the upper end thereof, is connected to the rods 87 and 93 of the inlet valve operating means. The latch member 140'is actuated to elevate its free end from engagement with the roller 145 of-lever 116 by an arm 152 having its lower end pinned or otherwise rigidly secured to the transverse shaft 147.

lVhen the press is open, the latch member 140 is in lowered position and the roller 145 transof lever 116 lies within the notch 144 of i I said latch member, as indicated in full lines,

Fig. 8. Inasmuch asthe rod 111 of the outlet valve operating means is directly connected to lever 116, movement of said rod and hence depression of the hand lever 105 is now impossible, since lever'116 is latched against movement. To actuate the operating means for the outlet or exhaust valve, it is first necessary to actuate the operating means for the inlet valve, to release latch 140 and thereby release for actuation the outlet valve operating means.

As before mentioned, depression of the hand lever 80 of the inlet valve operating means moves the rod 87 rearwardly, and since said rod is connected to lever 89 by pin 88,, rearward movement of said rod causes .clockwise movement of said lever. Since 1ever 89 is fast on shaft 147, clockwise movement of said lever causes corresponding movement of said shaft and corresponding clockwise movement of the arm 152 fast thereon. When the arm l52 is moved in such clockwise direction, its upper end engages and elevates the free end of the latchmember140, thereby freeingits notch 144 from engagement with the roller 145 of lever 116. The operating means for the outlet or exhaust valve can now be actuated, since movement of lever 116, and hence rods 111 and 120, is now posof the latch member after actuation of the outlet valve operating means to close said valve.

When the press is open, the pin 115 of lever 116 lies at the forward end of the slot 117 in the link 118 connected to rod 120 of of the outlet or exhaust valve, the lost motion in this pin and slot connection must bev taken up, since in. order to move the ,rod 120 rearwardly, the pin of lever 116 mustv be' moved to the rear end of slot 117. The

purpose of this lost motion connection is to effect closing of the inlet valve prior to the opening ofthe outlet orexhaust valve when it is desired to open the press. a

To open the press, the operator with her left hand raises the band lever 105 of the outlet valve operating means, causing the rod 111 and the lever 116 connected thereto to be moved forwardly. Since the pin 115 of said lever is at the rear end of slot 117, initial forward movement of lever 116 does not produce any movement of rod 120 and hence does not "actuate valve lever to open the outlet or exhaust valve. Such initial movement of lever 116 does, however,

hence efiects actuation of the inlet, valve operating lever 95 to produce closing of the inlet valve. By the time the inlet valve is closed, the pin 115 of lever 116 has reached the forward end of slot 117, and further clockwise movement of lever 116 produced by.

the operator raising the hand lever 105 and drawing forwardly rod 111, pulls the rod 120 forwardly and effects actuation of the outlet valve operating lever 125 to effect opening of the exhaust valve. The press is now free to be opened by the springs 8, since the inlet valve has been closed and the outlet valve has been opened. Such sequential operation of the valve prevents loss or escape of steam or air, as will be readily understood.

In order to cause the movable pressing member 7 to move uniformly down into pressing engagement with the stationary pressing member 3, and to prevent said movable pressing member from, moving away from the stationary pressing member and comin to rest with a shock or jar, there ex tends om the cylinder 30 piping 205 leading to a needle valve 206. Connected to this needle valve is piping 208 leading to the fitting 71 to which is connected the exhaust conduit 7 2. This needle valve 206 is adjusted to so restrict the escape of air from the lower end of cylinder 30 during the closing ofthe press as to produce a snubbing action which causes the movable pressing'member to move uniformly into pressing engagement with the stationary pressing member 3.- When the air is bein exhausted from theupper end of the cylinder 30, in the opening of the press, air will be drawn into the lower end vof cylinder 30 through the piping. 208, the

needle valve 206 and the piping 205,- causing a snubbing action to take place which prevents thepress from opening with a sudden claim is shock or -jar, all as will be readily under- Having described my invention, what I 1. A pressing machine, comprising relatively movable pressing members, means for, effecting engagement and disen agement of said pressing members to thereby close, and open the press and including a piston and cylinder structure, and mechanism for controlling the fiow of fluid to and from said piston and cylinder structure and including an inlet valve and an outlet valve, means normechanical means for automaticall maIIy eauSing said outlet valve to close, and

inlet valve and an outlet valve, means 'normally causing said outlet valve to close, and

maintaining said outlet valve open when t e press is open, said maintaining means being operated by opening movement of the press.

3. A pressing machine, comprising relatively movable pressing members, means for effecting engagement and disengagement of said pressing members to thereby'close and open the press and including a piston and cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder structure and including an inlet valve and an outlet valve, said outlet valve normally tending to close under the influence of a spring, and means for automatically maintaining said outlet valve open when the press is open, said maintaining means including spring means having greater strength than said valve closing spring only when the press is open, whereby said outlet valve will.

be held open by said maintaining means when the press is open.

4. A pressing machine, comprising relatively movable pressing members, means for effecting engagement and disengagement of said pressing members to thereby close and open the press and including apiston and cylinder structure, and mechanism for controlling the flowof fluid to and from said piston and cylinder structure and including an inlet valve and an outlet valve, said loutletwalve normally tending to close under the influence" of a s ring, and means for automatically maintaming said outlet valve open when the press is open, said maintaining means includmg spring means compressed by opening of the press and thereby strengthened to overcome the valve closing spring, whereby said outlet valve will be held open by said main- 1 taining means when the press is open.

5. A pressing machine, comprlsing relatively movable pressing members, means for effecting engagement and disengagement of said pressing members to thereby close and open thep ess, a device having a controlling e (act upon said means and having an opera tlve position and an inoperative position, and

means for automatically maintaining said device in one of said positions, said maintalning means including a sleeve connected to said device and provided with a coiled spring therein, and a member movable in said sleeve open the press, a devicehaving a controlling effect upon said means and having an operative position and 'an inoperative position, said device having a spring normally tending to move said device to one of said positions,

' and means for automatically maintaining said device in said other position, said maintaining means including a sleeve connected to said device and provided with a coiled spring therein, and a member movable in said sleeve for compressing said spring and connected to and movable with a part movable during relative movement of said pressing members, the compression of said maintaining spring rendering it stronger than the spring of said device, whereby upon compression of said maintaining spring themain taining means holds said device in said other I efi'ecting engagement and disengagement of position. I

7. .A pressing machine, comprising relatively movable pressing members, means for efi'ecting engagement and disengagemcntof said' pressing members to thereby close and open the press and including a piston-and cylinder structure, and inechanism for controlling the flow of fluid to and from said piston and cylinder structure and including a normally closed outlet valve, and means for automatically maintaining said valve open when the press is open, said maintaining means being effective to bring about opening of said valve until said pressing members have been brought into engagement. n

8. A pressing machine, comprising relatively movab e pressing members, means for said pressing members to thereby close and open the press and including a piston and cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder structure and including an inlet valve and an outlet valve, and sepa-,

rate mechanical maintaining means for said valves, said maintaining means being indeactuated. Y

pendently' operable.

, 9, A pressing machine, comprising relatively movable pressing members,-means for effecting. engagement and disengagement of said pressing membersto thereby close andopen the press and including a piston and. cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder structure and including two valves, and separate maintaining means for said valves, one of said maintaining open the press and including a piston and said pressing members to thereby close and efi'ecting engagement and disengagement of trolling the flow of fluid to' and from said trolling the flow of fluid to and from said piston and cylinderstructure and including 7 an inlet valve and an outlet, valve, and separate maintaining means for said valves, the mainta ning means for the inlet valve being ineffective when the maintaining means for the outlet 'valve is efl'ective.

11. A pressing machine, comprising relatively movable pressing members, means for effecting engagement and disengagement of said pressing members to thereby close and cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder structure, and. including an inlet valve and an outlet valve, and separate mamtami'ng means for said valves, the

maintaining means for the inlet valve being i inefl'ective when the press is open but eifective when: the press is closed and the maintaining means for the outlet valve being effective when the press is open but inell'ective when the press is closed.

l2. A- pressing machine, comprising rela-. tively movable pressing members, means for effecting engagement and disengagement of open the press and including a pisto n and cylinder structure, and mechanism for con-- trolling the flow of'fiuidto and from said piston andcylinder structure and including two valves, and means for preventing actuatio n of one of said valves until" after the other valve has been actuated.

13. A pressing machine, comprising relatively movable pressing members, means for said pressing members to thereby close and open the press and including a piston and cylinder structure,'and mechanism for conpis'ton and cylinderstructure and including an inlet valve and an outlet valve, and means .for preventing, the actuation of. said outlet valve until after said inlet valve has been 14. A pressing machine, comprising rela-' said pressing members to thereby close and open the press and including a piston and 2 rylinder structure, and mechanism for controlling the flow-of fluid to and from said 1 piston and cylinder structure-and including an inlet valve an outlet valve, and means for preventing the closing of. said outlet valve until after said'inlet valve has been opened. v

15. A pressing machine, comprising relatively movable pressing members, means for effecting cngagement and disengagement of said pressing members to thereby close and open the press and including a piston and cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder structure and including two valves, and means for latching one of said valves against operation when the press is open, said latch means being releasable by I actuation of the other valve.

16. A pressing machine, comprising relatively movable pressing members, means for effecting -engagement and disengagement of said pressing members to thereby close and open the press and including a piston and cyl- 2 inder structure, and miechanism for control- --ling the flow of fluid to and from said piston and cylinder structure and including an inlet valve and an outlet valve, and means for tively movable pressing members, means for efl'ecting engagement and disengagement of said pressing members to thereby close and open the press and includinga'piston and cylinder structure, and mechanism for control ling the flow of fluid to-and from said piston and cylinder structure and including an inlet and an outlet valve, means for effecting the closing'of the .inlet vvalveby opening operation of the outlet valve; and means for-effecting the closing of said inlet valve prior to the opening of said outlet valve.

21. A pressing (machine, comprising relatively movable pressing members, means for, effecting engagement and disengagement of said pressing members to thereby close and open the press and including a piston and cylinder structure, and mechanism for controlling the flow of fluid to and from said piston and cylinder-structure and including an inlet and an outlet valve, operating means for said inlet valve, operating means for said outlet valve," means for interlocking said latching the outlet valve open when the press' valve operating. means so as to effect actuais open, said latch means being releasable by closing of the inlet valve.

17. A pressing machine; comprising relatively movable pressing 'meinbe'rs, means for effecting" engagement and disen agement of sa d pressing members to there y close and open the press and including a piston and I cylinder structure, and mechanism for controlling the flow of fluid to and from said piston'atid cylinder structure andincluding an inlet and an outlet valve,.said inlet valve being operable independently of said outlet valve, and means for effecting operation of both of said valves by ,the operation of one.

18.--A pressing machine, comprising rela- "40 tively movable pressing members, means for effecting engagement and disengagement of said pressing members to thereby close and open the press and including a piston and cylinder structure, and mechanism for con- 3 trolling the flow of fluidto and from said piston andcylinder structure and including and inlet and an outlet valve, said inlet valve being operable independently of said outlet valve, and meansfor effecting the closing of 53 one of said valves and the opening of the other by the operation of one.

19. A pressing machine, comprising relatively movable pressing members, means for effecting engagement and disengagement of 3 said pressing members to thereby close and open the press and including a pi stonand cylinder structure, and mechanism for control ling the flow of fluid to and from said piston and cylinder structure andincluding an in- C3 let and an outlet valve, said inlet valve being operable independently 0 said outlet valve,

and means for effecting the closing of the in let1 valve by opening operation of the outlet va ve.

C5 20. A pressing machine, comprising i'elas tion of the inlet valve operating-means to effect closing of said valve by the actuation of the outlet valve operating means to effect opening of the outlet valve, and a lost mo- .tion connection in the, operating means for said outlet valve for effecting the closing-of the inlet valve prior to the opening of the outlet valve.

22."A pressing machine, comprising relatively movable pressing members, means for I effecting engagement and disengagement of said pressing'members to thereby close and open the press and including a piston and cylinder structure, and mechanism for controlling the flow of fluid to and from saidv piston and cylinder structure and including an inlet valve and an outlet valve, latch means for holding said outlet valve against operation when the press is open, and means for interlocking said valves so as to efi'ect the release of said latch by operation of said inlet valve and for effecting, when the press is closed, the closing of said inlet valve by opening operation ofsaid outlet valve. v

23.,A pressing machine, comprising relatively movable pressingmembers, means ineluding a pair of valves for effecting engagement and disengagement of said pressing members to thereby close and open the press,

and mechanism for controlling the operation 7 of said means and including two valve controlling members, one for each valve, for ac-' tuation by the operator, and means for preventing the actuation of one ob said valve controlling members until after( the other valve controlling member has been actuated.

24. A pressing machine, comprising relativelymovablepressing members, means for effecting engagement and disengagement of said pressing membersto thereby close and open the press and including aninlet valve and an outlet valve, and mechanism for controlling the operation of said means and includin two valve controlling members for actuatlon by the operator, there being a controlling member for the inlet valve and a controlling member for the outlet valve, and means for preventing the actuation of the outlet valve controllin member until after the inlet valve controllmg member has been actuated.

In testimony whereof I hereby affix my signature.

ROBERT C. PAULY.- 

